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Round|Lab Grown|IGI

1.20ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG451056607

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451056607

Diamond specifications and retailer prices

From $986 AUD
As of November 5, 2026
Save $4,934 AUD (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $5,920 AUD at MOH London · As of November 5, 2026
View at MOH London

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451056607 or 451056607. Listed at 13 retailers as of November 5, 2026, with prices from $986 to $5,920, a $4,934 spread on the same certified stone. MOH London lists it at $5,920. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.20
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451056607
Dimensions6.85 × 6.89 × 4.17 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.85 mm6.89 mm1.20 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451056607
Side View
Table 60.0%Crown 32.2°GirdlePavilion 41.5°Culet: NoneDepth 60.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $5,920 AUD|Low: $986 AUD|High: $6,007 AUD|Avg: $2,496 AUD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 5$986 AUD
Retailer 6$1,593 AUD
Retailer 11$1,733 AUD
Retailer 10$1,784 AUD
Retailer 7$1,847 AUD
Retailer 9$1,847 AUD
Retailer 2$2,120 AUD
Retailer 8$2,938 AUD
Retailer 4$3,140 AUD
Retailer 3$3,463 AUD
MOH London$5,920 AUD

45 data points across 11 retailers

13 retailers$986 AUD to $5,920 AUD

A
Cheapest Retailer
-
$986 AUD
B+
Retailer 2
-
$1,593 AUD
View
B+
Retailer 3
-
$1,733 AUD
View
B+
Retailer 4
-
$1,784 AUD
View
Final sale: no returns
Retailer 5
-
$1,847 AUD
View
Price last confirmed 25 days ago
B+
Retailer 6
-
$1,847 AUD
View
B+
Retailer 7
-
$2,093 AUD
View
B+
Retailer 8
-
$2,120 AUD
View
B
Retailer 9
-
$2,938 AUD
View
B
Retailer 10
-
$3,140 AUD
View
B
Retailer 11
-
$3,463 AUD
View
B
Retailer 12
-
$3,747 AUD
View
Most Expensive
B
MOH London
LG451056607 · Nov 5
$5,920 AUD
£3,263 GBP
View
12 more retailers have this diamond
Prices start from $986 AUDSave up to $4,934 AUD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.20ct Round
$986 AUD